scope:

Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose.

To provide a means of performing Squeak & Rattle (S&R) diagnostics or subjectively evaluating subassemblies, subsystems components for squeak and rattle performance relative to vibration degradation over normal life expectancy.

This procedure is intended for Development work only and not for Validation.

Foreword.

This degradation test is based on MIL Standard 810 which states the total test time may be exponentially reduced relative to a linear increase in test load. The relationship between test time and load is governed by the equation explained in Appendix A.

This test is limited to degrading a subassembly, subsystem or component due to random simulated road vibration inputs only. It does not address environmental effects, static load effects customer actuated inputs.

Please refer to the Squeak and Rattle Website for the "Complete Multi-axis Vibration Tables", to find the vibration test profiles.

All evaluations called for in this procedure are documented in GMW7293 and GMW14264 and should be performed in accord with GMW7293 and GMW14264.

Applicability.

This procedure is applicable any automotive subassembly, subsystem component where squeaks and rattles are concern and the vibration environment can be simulated.